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LIST.DOC
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Text File
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1985-07-17
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10KB
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243 lines
LIST Page 1
LIST Version 5.2
(c) Copyright Vernon D. Buerg 1985
Command LIST
-------------
Purpose: To display the contents of an ASCII text file, line by line
with the aid of scrolling and positioning commands.
Format: LIST [d:][path]filename[.ext]
Remarks: An ASCII file of any size may be listed.
The "filename" is optional. If omitted, you are prompted to
to enter a filename. You may include drive, path, and wild
cards in the file name. The first file which matches the name
is displayed until an end-of-file character is encountered. Each
file which matches the "filename" may be displayed.
LIST was designed to display ASCII files. That is, files
which contain text and not binary or control codes. Text
characters usually range from a value of 32 to 127.
Characters below 32 (a blank) are replaced with a funny
character to indicate that a non-displayable character has been
encountered. This character is an upside-down question mark.
Characters above 127 may be valid graphic characters, and may
be displayed if the '8' command is in effect. To insure that
characters above ASCII value 127 are not displayed, use the '7'
command.
The file is displayed with one logical record on each
80-column display line. A logical record ends in a linefeed.
The maximum logical record may be 255 characters long. If the
record exceeds 80 characters, you may view the portion beyond
the 80 columns by using the scroll right command, or by using
the Wrap feature.
The Wrap command toggles ON or OFF the wrapping of lines
longer than 80 characters. With Wrap on, lines are displayed in
their entirety, 80 characters per display line. The scroll
-left and -right functions are disabled when Wrap is ON.
The file may be PRINTed as it it displayed. The P command
toggles the printer on or off. When first entered, the P
command causes the current screen to be printed. As new lines
are displayed, they too are printed. Printing may be stopped by
entering another P command. The PrtSc key may also be used, but
the title and prompt lines will be printed with the lines of the
file. Empty lines cause a line to be skipped on the printer.
LIST Page 2
Key functions and Commands
--------------------------
On the COMMAND line, enter a letter or control key:
Letter(s) Default Function
--------- ------- ------------------------
A find next occurance of 'text'
B skip to end of file (bottom)
D or + scroll down one page
F Find 'text' regardless of case
H or ? list commands (HELP)
K off toggle keyboard flush
L scroll left 20 columns
N down one (next) line
P off toggle printer on or off
Q display next matching file
R scroll right 20 columns
S Scan for exact text match
T restart from first block (top)
U or - scroll up one page
W off toggle wrap of lines over 80 chars
| X terminate, clear screen and exit to DOS
7 off turn off high bit (non-graphics only)
8 on leave high bit on (graphics)
\text Find 'text' regardless of case
/text Scan for exact text match
Control key Function
----------- -------------------------------------------
Enter continue to next page
| END position to end of block
ESCape Display next matching file
HOME restart from first block (top)
PgUp scroll up one page
PgDn scroll down one page
left arrow scroll left 20 columns
right arrow scroll right 20 columns
up arrow up one (previous) line
down arrow down one (next) line
ctl-HOME restart from CURRENT (64k) block
ctl-PgUp restart from first block (TOP)
ctl-PgDn skip to end of file (BOTTOM)
ctl-left-arrow reset scroll to column 1
F1 Help - display summary of commands
F3 Find next occurrance of text
F10 Exit to DOS
| F5 change background color for top and bottom lines
| F6 change foreground color for top and bottom lines
| F7 change background color for main body of display
| F8 change foreground color for main body of display
| alt-C clone LIST.COM, change colors permanently in program file
LIST Page 3
Screen attributes
-----------------
| The colors used for displaying the titles and main body of
| text may be changed temporarily or permanently. To make a
| permanent change, the cloning command alt-C is used. It requires
| that the LIST.COM program file be on the current drive and in
| the current directory.
There are three classes of attributes used. One for normal
display lines - lines 2 to 24 - another for special lines -
lines 1 and 25, and a third for the Find/Scan color. The border
is not changed. The foreground color applies to the characters
displayed.
| These color attributes may be changed by using these function keys:
| For the top and bottom lines
| F5 - background color
| F6 - foreground color
|
| For the main body of text
| F7 - background color
| F8 - foreground color
| Once you have decided upon the colors, use the alt-C key
| combination to change the LIST.COM program file.
LIST Page 4
Scanning for text
-----------------
You may use Find (\) to search for text regardless of the
case, or you may use Scan (/) to find an exact match.
To scan for a character string, type a slash (/) followed by
one or more (up to 32) characters. The scan text, but not the
slash, is displayed on the command line. The scan is case
sensitive. That is, lower case scan text will only match lower
lower case file text.
While the program is searching for the text, the bottom
display line is changed to say "Scanning".
If the text is found, the line containing it is displayed as
a high-intensity line.
If the text is NOT found, the bottom line (25) is changed to
say '*** text not found ***', and the display remains unchanged.
To find the next occurrance of the same text, use the A)gain
command, or press the F3 key.
LIST Page 5
Update history
==============
Lines beginning with | denote changes to the latest version.
Version 4.1, April 27, 1984.
Version 4.15, June 2, 1984.
Version 4.2, July 14, 1984.
Version 5.0, August 10, 1984.
Version 5.1, August 27, 1984.
Version 5.2, September 29, 1984.
Version 5.4, March 22, 1984.
Version 5.48, May 27, 1985.
Version 5.49, May 31, 1985.
Corrects ctrl-PgDn, adds file date/time display
Wrap forces Left column and Top of file
| Version 5.52, July 15, 1985.
| Correct Print command problems
| Adds alt-C to clone LIST.COM with new colors
| The X command now clears the screen when exiting to DOS,
| while F10 leaves the last display on the screen.
LIST Page 6
Restrictions
------------
Some positioning is relative to the current block in storage.
The size of the block depends on the amount of memory available,
and up to 64K-bytes is allocated to the file buffer. The program
requires at least 6K bytes.
o PC-DOS Version 2.0 or later is required.
o ANSI.SYS is NOT required.
Written by Vernon Buerg for the IBM PC using DOS 2.0 or
later, including DOS 3.1.
LIST is supplied for personal, private use. Feel free to
distribute LIST given these restrictions:
o the program shall be supplied in its original,
unmodified form, which includes this documentation;
o no fee is charged.
o commmercial use is prohibited.
o the program may not be included - or bundled - with
other goods or services. Exceptions may be granted
upon written request only.
If you are using LIST and find it of value, your contribution
in any amount ($15 suggested) will be greatly appreciated.
For use by corporations and other institutions, please
contact AAI Systems for a site licensing agreement.
Vernon D. Buerg
AAI Systems, Inc.
456 Lakeshire Drive
Daly City, CA 94015
Data: (415) 994-2944, 2am-10am PDT